package com.tb.filter;

import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.List;

//做登录检查的Filter
//@Component
//@Slf4j
//public class CheckTokenFilter implements GlobalFilter, Ordered {

//    @Override
//    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
//        //1.拿到请求头中的token
//        List<String> tokens = exchange.getRequest().getHeaders().get("token");
//
//        log.info("检查 TOKEN = {}", tokens);
//        if (tokens == null || tokens.isEmpty()) {
//            //响应对象
//            ServerHttpResponse response = exchange.getResponse();
//            //构建错误结果
//            HashMap<String, Object> data = new HashMap<>();
//            data.put("code", 401);
//            data.put("success", false);
//            data.put("message", "未登录");
//
//            DataBuffer buffer = null;
//            try {
//                byte[] bytes = JSON.toJSONString(data).getBytes("utf-8");
//                buffer = response.bufferFactory().wrap(bytes);
//
//                //设置完成相应，不会继续执行后面的filter
//                //response.setComplete();
//                response.setStatusCode(HttpStatus.UNAUTHORIZED);
//                response.getHeaders().add("Content-Type", "application/json;charset=UTF-8");
//            } catch (UnsupportedEncodingException e) {
//                e.printStackTrace();
//            }
//
//            //把结果写给客户端
//            return response.writeWith(Mono.just(buffer));
//        }
//
//        log.info("Token不为空 ，放行");
//        return chain.filter(exchange);
//    }
//
//    @Override
//    public int getOrder() {
//        return -10;
//    }
//}
